Adjustment Instruction - LG 49VM5C Service Manual

1. Application Range
This spec. sheet applies to LW56C Chassis applied all of Sig-
nage Monitors manufactured in SIGNAGE SET factory.
2. Specification
1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
2) Adjustment must be done in the correct order.
3) The adjustment must be performed in the circumstance of
25 °C ± 5 °C of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation.
4) The input voltage of the receiver must keep AC 100-240
V~, 50/60 Hz.
5) At first Worker must turn on the SET by using Power Only
key.
6) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15.
In case of keeping module is in the circumstance of 0 °C, it
should be placed in the circumstance of above 15 °C for 2
hours.
In case of keeping module is in the circumstance of below -20
°C, it should be placed in the circumstance of above 15 °C for
3 hours.
Caution) When still image is displayed for a period of 20 min-
utes or longer (especially where W/B scale is strong. Digital
pattern 13ch and/or Cross hatch pattern 09ch), there can
some afterimage in the black level area
3. Adjustment items
3.1. Main PCBA Adjustments MAC Address
Download
▪ Adjust RGB (ADC)
▪ EDID/DDC download
▪ MAC Address Download
- Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Star Menu 1.AD-
JUST CHECK.. RGB-PC Adjust will be calculated by 480i
adjust value.
3.2. Final Assembly adjustment
▪ White Balance adjustment
▪ RS-232C functionality check
▪ Factory Option setting per destination
▪ Ship-out mode setting (In-Stop)
3.3. Etc.
▪ Ship-out mode
▪ Service Option Default
▪ Tool option menu, USB Download(S/W Update, Option,
Service only)
▪ ISP Download(Option)
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes

ADJUSTMENT INSTRUCTION

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4. Automatic Adjustment
4.1. ADC Adjustment
4.1.1. Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation.
4.1.2. Equipment & Condition
1) JIG (RS-232C protocol)
2) MSPG-925 Series Pattern Generator(MSPG-925FA, pat-
tern -65)
- Resolution : 1080p (Inner Pattern)
1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
- Image
4.1.3. Adjustment
4.1.3.1. Adjustment method
▪ Using RS-232C, adjust items listed in 3.1 in the other shown
in "4.1.3.3"
4.1.3.2. Adj. protocol
Protocol Command
Enter adj. mode aa 00 00 a 00 OK00x
xb 00 60 b 00 OK04x (Adjust 480i, 1080p Comp1 )
Source change
xb 00 10 b 00 OK06x (Adjust 1920*1080 RGB)
Begin adj. ad 00 10
OKx (Case of Success)
Return adj. result
NGx (Case of Fail)
(main) (main)
ad 00 20 000000000000000000000000007c007b006dx
Read adj. data
(sub ) (Sub)
ad 00 21 000000070000000000000000007c00830077x
NG 03 00x (Fail)
NG 03 01x (Fail)
Confirm adj. ad 00 99
NG 03 02x (Fail)
OK 03 03x (Success)
End adj. aa 00 90 a 00 OK90x
Ref.) ADC Adj. RS232C Protocol_Ver1.0
4.1.3.3. Adj. order
▪ aa 00 00 [Enter ADC adj. mode]
▪ xb 00 60 [Change input source to RGB(1024*768)]
▪ ad 00 10 [Adjust 1024*768RGB]
▪ aa 00 90 End adj.
Ref) ADC adj. RS232C Protocol_Ver1.0
Set ACK
LGE Internal Use Only